Mjör I A
Department of Operative Dentistry, College of Dentistry, University of Florida, Gainesville, USA.
Acta Odontol Scand. 1997 Jan;55(1):58-63. doi: 10.3109/00016359709091943.
A cross-sectional survey among practitioners in Sweden treating adult patients was initiated to record the reasons for replacement of composite, amalgam, and glass ionomer restorations and to compare the findings with those obtained about 16 years ago. The age of the failed restorations was also recorded. The clinical diagnosis of secondary caries was the main reason for the replacement of all three types of restorations. The diagnosis was significantly higher for amalgam restorations than for composite and glass ionomer restorations. No statistically significant differences could be found in the diagnosis of secondary caries between composite and glass ionomer restorations. Major changes in the reasons for replacement of composite restorations were noted by comparing the present results with those from 16 years ago. A notable difference was seen with regard to a decrease in the relative frequency of replacements due to composite degradation/wear and an increase in the replacements due to bulk and marginal fractures. The reasons for replacement of amalgam restorations had remained much the same over the 16 years. The report that half the glass ionomer restorations replaced had the diagnosis secondary caries was by far the most surprising result. The age of the failed restorations were reported for a limited number of restorations. The median age was about 6 years for composite, almost 9 years for amalgam, and just more than 3 years for glass ionomer restorations.
在瑞典开展了一项针对治疗成年患者的从业者的横断面调查，以记录复合树脂、银汞合金和玻璃离子修复体替换的原因，并将结果与约16年前获得的结果进行比较。还记录了失败修复体的使用年限。继发龋的临床诊断是所有三种类型修复体替换的主要原因。银汞合金修复体的这一诊断显著高于复合树脂和玻璃离子修复体。复合树脂和玻璃离子修复体在继发龋诊断方面未发现统计学上的显著差异。通过将当前结果与16年前的结果进行比较，发现复合树脂修复体替换原因有重大变化。一个显著差异是，由于复合树脂降解/磨损导致的替换相对频率下降，而由于大块和边缘折断导致的替换增加。在这16年中，银汞合金修复体的替换原因基本保持不变。报告称，被替换的玻璃离子修复体中有一半被诊断为继发龋，这是迄今为止最令人惊讶的结果。仅对有限数量的修复体报告了失败修复体的使用年限。复合树脂修复体的中位使用年限约为6年，银汞合金修复体约为9年，玻璃离子修复体刚超过3年。
